[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20140220181146.GU4250@linux.vnet.ibm.com>
Date: Thu, 20 Feb 2014 10:11:46 -0800
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Torvald Riegel <triegel@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Will Deacon <will.deacon@....com>,
Peter Zijlstra <peterz@...radead.org>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
David Howells <dhowells@...hat.com>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"mingo@...nel.org" <mingo@...nel.org>,
"gcc@....gnu.org" <gcc@....gnu.org>
Subject: Re: [RFC][PATCH 0/5] arch: atomic rework
On Thu, Feb 20, 2014 at 06:54:06PM +0100, Torvald Riegel wrote:
> xagsmtp4.20140220175519.1127@...dvm6.vnet.ibm.com
> X-Xagent-Gateway: vmsdvm6.vnet.ibm.com (XAGSMTP4 at VMSDVM6)
>
> On Thu, 2014-02-20 at 00:30 -0800, Paul E. McKenney wrote:
> > Well, all the compilers currently convert consume to acquire, so you have
> > your wish there. Of course, that also means that they generate actual
> > unneeded memory-barrier instructions, which seems extremely sub-optimal
> > to me.
>
> GCC doesn't currently, but it also doesn't seem to track the
> dependencies, but that's a bug:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59448
Ah, cool!
Thanx, Paul
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists